Category: Physics

How do you calculate percent uncertainty in resistance? The rule to calculate errors says that: When two quantities are multiplied or divided, the relative error is the sum of the relative errors in the individual quantities. So the uncertainty in resistance is 7%. What is the uncertainty of a resistor? Using the maximum values for […]

How do you achieve long term economic growth? 2. Long-term economic growth Increased capital. e.g. investment in new factories or investment in infrastructure, such as roads and telephones. Increase in working population, e.g. through immigration, higher birth rate. Increase in labour productivity, through better education and training or improved technology. What are the consequences of […]

How many groups are on the central atom? There are five groups around the central atom, three bonding pairs and two lone pairs. How many lone pairs are in ab3? Hint: The shape of AB3 with one lone pair on central atom can be pyramidal . if there is no lone pair of electrons present […]

What is the current through r1 r2 and R3? 1. What is the current flow through R1, R2, and R3? = 1 Amp. Why do you divide r1 r2 by 4? Ring main cabled in parallel,so the csa of the cable is half & the resistance of the cable is half. So 1/2 x 1/2 […]

What are the five kinematic equations? Building on what you have learned so far and what Galileo presented, we have what my physics teacher, Glenn Glazier, liked to call the Five Sacred Equations of Kinematics for constant acceleration. In these equations, v is velocity, x is position, t is time, and a is acceleration. Remember, […]

What are the advantages of incandescent light bulbs? Advantages of Incandescent Bulb ➨It is less expensive due to lower initial cost. ➨It is easier to dim with rheostats. ➨It produces warmer color compare to fluorescent and thungsten-halogen lamps. ➨It generates relatively high light output. What are advantages and disadvantages of a standard incandescent light bulb? […]

What is the kinetic energy of a molecule? Kinetic Energy and Molecular Speed Gas particles are in constant motion, and any object in motion has kinetic energy (Ek). Kinetic energy, for an individual atom, can be calculated by the following equation where m is the mass, and u is the speed. How does temperature relate […]

Can the mind exist without the body? It is possible one’s mind might exist without one’s body. One’s mind is a different entity from one’s body. What does Descartes think of the soul? Descartes considered the body and the soul to be ontologically separate but interacting entities, each with its own particular attributes. He then […]

What are the causes of strain? What causes a strain? A strain is caused by twisting or pulling a muscle or tendon. Strains can be acute or chronic. An acute strain is caused by trauma or an injury such as a blow to the body; it can also be caused by improperly lifting heavy objects […]

What is evaporation and examples? Evaporation is defined as the process in which the state of water from liquid to gaseous or to vapour state takes place. The rate of evaporation is dependent on the temperature. As the temperature increases, the evaporation rate increases. The melting of an ice cube is an example of evaporation. […]